Updated from 1:29 p.m. ET
The Chicago-based company's shares were up $1.19, or 7.3% to $17.48.
Shares of Guangshen Railway (GSH) of China were up 93 cents, or 6.1%, to $16.26.Burlington Northern Santa Fe (BNI), a holding of Warren Buffett's Berkshire Hathaway (BRK.A), was up 78 cents, or 1.2% to $63.72. Shares of CSX (CSX) were up 37 cents, or 1.4% to $27.85. Union Pacific (UNP - Get Report) shares were up 15 cents, or 0.4% to $40.96.